webdam-1.0.x-dev/modules/webdam_sns/webdam_sns.services.yml

services:
  webdam.config_hash_generator:
    class: Drupal\webdam_sns\EventSubscriber\NotificationSubscriber
    arguments: ['@webdam.service', '@entity_type.manager', '@logger.factory', '@config.factory']
    tags:
      - { name: event_subscriber }